Muscles of the Thorax (Origin, Insertion, Function)

Content
Introduction 0:00
Division of the Thoracic Muscles 0:10
Subclavius Muscle 1:05
Serratus Anterior 1:24
Pectoralis Minor 1:58
Pectoralis Major 2:23
Subcostal Muscles 2:56
Transverse Thoracis 3:26
Internal Intercostal Muscles 3:44
External Intercostal Muscles 3:59
Levatores Costarum Muscles 4:18
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Superficial Muscles
- Thoracohumeral muscles
- Subclavius
- Serratus Anterior
- Pectoralis Minor
- Pectoralis Major
Deep Muscles
- Proper muscles of the thorax
- External Intercostal muscles
- Internal Intercostal muscles
- Subcostal
- Transverse Thoracis
- Levatores Costarum

Subclavius
musculus subclavius
- Origin: First Rib
- Insertion: Lower surface of clavicle
Serratus Anterior
musculus serratus anterior
- Origin: External Surface of Ribs 1-9
- Insertion: Medial border of Scapula
Pectoralis Minor
musculus pectoralis minor
- Origin: External Surface of Ribs 3-5
- Insertion: Coracoid process of Scapula
processus coracoideus scapulae
Pectoralis Major
musculus pectoralis major
- Clavicular Part
Pars clavicularis
- Sternocostal Part
Pars sternocostalis
- Abdominal Part
Pars abdominalis
- Insertion: Crest of the greater tubercle
crista tuberculi majoris humeri
Subcostal Muscles
Musculi subcostales
- Origin: Lower Rib
- Insertion: Upper Rib
Transverse Thoracis
musculus transversus thoracis
- Origin:
Internal Surface of Sternum
Xiphoid Process
Cartilage of 4th-7th Rib
- Insertion: Cartilage of 2nd-6th Rib
Internal Intercostal muscles
musculus intercostales interni
- Origin: Lower Rib
- Insertion: Upper Rib
External Intercostal muscles
Musculi intercostalis externi
- Origin: Upper Rib
- Insertion: Lower Rib
Levatores costarum
Musculi levatores costarum
- Levatores costarum breves
○ Origin:
Transverse Process C7-T11
○ Insertion:
One Rib Below
- Levatores costarum longi
○ Origin:
Transverse Process T8-T11
○ Insertion:
Two Ribs Below

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Simple and clear explanation

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[@user-bi9lj3iv4b]

what origin and insert mean?

[@semy1011]

That means where the muscle begins and where it ends

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